Strivers A2Z DSA Course/Sheet - Crack Any FAANG or PBCs

Problem		Practice	Difficulty
User Input / Output	Solve	-	Easy
Data Types	Solve	-	Easy
If Else statements	Solve	-	Easy
Switch Statement	Solve	-	Easy
What are arrays, strings?	Solve	-	Easy
For loops	Solve	-	Easy
While loops	Solve	-	Easy
Functions (Pass by Reference and Value)	Solve	-	Easy
Time Complexity [Learn Basics, and then analyse in next Steps]	-	-	Easy

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Patterns

Solve

-

Easy

Status	Problem		Resource (Plus)	Resource (Free)	Practice	Note	Revision	Difficulty
	C++ STL	-			-			Medium
	Java Collections	-		-	-			Easy

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

C++ STL

-

Medium

Java Collections

-

Easy

Problem		Practice	Difficulty
Count Digits	Solve	-	Easy
Reverse a Number	Solve		Easy
Check Palindrome	Solve		Easy
GCD Or HCF	Solve	-	Easy
Armstrong Numbers	Solve		Easy
Print all Divisors	Solve	-	Easy
Check for Prime	Solve	-	Easy

Problem		Practice	Difficulty
Understand recursion by print something N times	-	-	Easy
Print name N times using recursion	-	-	Easy
Print 1 to N using recursion	Solve	-	Easy
Print N to 1 using recursion	Solve	-	Easy
Sum of first N numbers	Solve	-	Easy
Factorial of N numbers	Solve	-	Easy
Reverse an array	Solve	-	Easy
Check if a string is palindrome or not	Solve		Medium
Fibonacci Number	Solve		Easy

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Hashing Theory

-

Medium

Counting frequencies of array elements

Solve

-

Easy

Find the highest/lowest frequency element

Solve

-

Easy

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Selection Sort

Solve

-

Easy

Bubble Sort

Solve

-

Easy

Insertion Sort

Solve

-

Easy

Problem		Resource (Free)	Practice	Difficulty
Merge Sort	Solve		-	Medium
Recursive Bubble Sort	Solve	-	-	Easy
Recursive Insertion Sort	Solve	-	-	Easy
Quick Sort	Solve		-	Easy

Problem		Practice	Difficulty
Largest Element in an Array	Solve	-	Easy
Second Largest Element in an Array without sorting	Solve	-	Easy
Check if the array is sorted	Solve		Easy
Remove duplicates from Sorted array	Solve		Easy
Left Rotate an array by one place	Solve		Easy
Left rotate an array by D places	Solve		Easy
Move Zeros to end	Solve		Easy
Linear Search	Solve	-	Easy
Find the Union	Solve	-	Medium
Find missing number in an array	Solve		Easy
Maximum Consecutive Ones	Solve		Easy
Find the number that appears once, and other numbers twice.	Solve		Medium
Longest subarray with given sum K(positives)	Solve	-	Medium
Longest subarray with sum K (Positives + Negatives)	Solve	-	Medium

Problem		Practice	Difficulty
2Sum Problem	Solve		Medium
Sort an array of 0's 1's and 2's	Solve		Medium
Majority Element (>n/2 times)	Solve		Easy
Kadane's Algorithm, maximum subarray sum	Solve		Easy
Print subarray with maximum subarray sum (extended version of above problem)	Solve	-	Medium
Stock Buy and Sell	Solve		Easy
Rearrange the array in alternating positive and negative items	Solve		Medium
Next Permutation	Solve		Medium
Leaders in an Array problem	Solve	-	Easy
Longest Consecutive Sequence in an Array	Solve		Easy
Set Matrix Zeros	Solve		Medium
Rotate Matrix by 90 degrees	Solve		Medium
Print the matrix in spiral manner	Solve		Medium
Count subarrays with given sum	Solve		Easy

Problem		Practice	Difficulty
Pascal's Triangle	Solve		Medium
Majority Element (n/3 times)	Solve		Medium
3-Sum Problem	Solve		Medium
4-Sum Problem	Solve		Hard
Largest Subarray with 0 Sum	Solve	-	Medium
Count number of subarrays with given xor K	Solve	-	Hard
Merge Overlapping Subintervals	Solve		Medium
Merge two sorted arrays without extra space	Solve		Medium
Find the repeating and missing number	Solve	-	Hard
Count Inversions	Solve	-	Hard
Reverse Pairs	Solve		Hard
Maximum Product Subarray	Solve		Easy

Problem		Practice	Difficulty
Binary Search to find X in sorted array	Solve		Easy
Implement Lower Bound	Solve	-	Easy
Implement Upper Bound	Solve	-	Easy
Search Insert Position	Solve		Easy
Floor/Ceil in Sorted Array	Solve	-	Medium
Find the first or last occurrence of a given number in a sorted array	Solve		Easy
Count occurrences of a number in a sorted array with duplicates	Solve	-	Easy
Search in Rotated Sorted Array I	Solve		Medium
Search in Rotated Sorted Array II	Solve		Medium
Find minimum in Rotated Sorted Array	Solve		Medium
Find out how many times has an array been rotated	Solve	-	Easy
Single element in a Sorted Array	Solve		Easy
Find peak element	Solve		Hard

Problem		Practice	Difficulty
Find square root of a number in log n	Solve	-	Medium
Find the Nth root of a number using binary search	Solve	-	Medium
Koko Eating Bananas	Solve		Hard
Minimum days to make M bouquets	Solve		Hard
Find the smallest Divisor	Solve		Easy
Capacity to Ship Packages within D Days	Solve		Hard
Kth Missing Positive Number	Solve		Easy
Aggressive Cows	Solve	-	Hard
Book Allocation Problem	Solve	-	Hard
Split array - Largest Sum	Solve		Hard
Painter's partition	Solve	-	Hard
Minimize Max Distance to Gas Station	Solve		Hard
Median of 2 sorted arrays	Solve		Hard
Kth element of 2 sorted arrays	Solve	-	Medium

Problem		Practice	Difficulty
Find the row with maximum number of 1's	Solve	-	Easy
Search in a 2 D matrix	Solve		Medium
Search in a row and column wise sorted matrix	Solve		Medium
Find Peak Element (2D Matrix)	Solve		Hard
Matrix Median	Solve	-	Hard

Problem		Resource (Plus)	Resource (Free)	Difficulty
Remove outermost Paranthesis	Solve	-	-	Easy
Reverse words in a given string / Palindrome Check	Solve		-	Easy
Largest odd number in a string	Solve		-	Easy
Longest Common Prefix	Solve		-	Easy
Isomorphic String	Solve		-	Easy
check whether one string is a rotation of another	Solve		-	Medium
Check if two strings are anagram of each other	Solve		-	Medium

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Sort Characters by frequency	Solve		-		Easy
Maximum Nesting Depth of Paranthesis	Solve	-	-		Easy
Roman Number to Integer and vice versa	Solve	-	-		Easy
Implement Atoi	Solve		-		Medium
Count Number of Substrings	-	-	-	-	Medium
Longest Palindromic Substring[Do it without DP]	-	-	-		Hard
Sum of Beauty of all substring	Solve	-	-		Medium
Reverse Every Word in A String	Solve		-		Easy

Problem		Resource (Plus)	Practice	Difficulty
Introduction to LinkedList, learn about struct, and how is node represented	-		-	Easy
Inserting a node in LinkedList	Solve		-	Easy
Deleting a node in LinkedList	Solve			Medium
Find the length of the linkedlist [learn traversal]	Solve	-	-	Easy
Search an element in the LL	Solve	-	-	Easy

Problem		Resource (Plus)	Practice	Difficulty
Introduction to DLL, learn about struct, and how is node represented	Solve		-	Easy
Insert a node in DLL	Solve		-	Easy
Delete a node in DLL	Solve		-	Medium
Reverse a DLL	Solve	-	-	Medium

Problem		Practice	Difficulty
Middle of a LinkedList [TortoiseHare Method]	Solve		Easy
Reverse a LinkedList [Iterative]	Solve		Easy
Reverse a LL [Recursive]	Solve		Easy
Detect a loop in LL	Solve		Medium
Find the starting point in LL	Solve		Medium
Length of Loop in LL	Solve	-	Easy
Check if LL is palindrome or not	Solve		Medium
Segrregate odd and even nodes in LL	Solve		Medium
Remove Nth node from the back of the LL	Solve		Medium
Delete the middle node of LL	Solve		Medium
Sort LL	Solve		Medium
Sort a LL of 0's 1's and 2's by changing links	Solve	-	Medium
Find the intersection point of Y LL	Solve		Medium
Add 1 to a number represented by LL	Solve	-	Medium
Add 2 numbers in LL	Solve		Medium

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Delete all occurrences of a key in DLL

Solve

-

Medium

Find pairs with given sum in DLL

Solve

-

Medium

Remove duplicates from sorted DLL

Solve

-

Medium

Problem		Practice	Difficulty
Reverse LL in group of given size K	Solve		Hard
Rotate a LL	Solve		Medium
Flattening of LL	Solve	-	Hard
Clone a Linked List with random and next pointer	Solve		Hard

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Recursive Implementation of atoi()	Solve		-		Hard
Pow(x, n)	Solve				Medium
Count Good numbers	Solve	-	-		Easy
Sort a stack using recursion	Solve	-	-	-	Medium
Reverse a stack using recursion	Solve	-	-	-	Easy

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Generate all binary strings	Solve	-	-	-	Medium
Generate Paranthesis	Solve		-		Medium
Print all subsequences/Power Set	Solve				Medium
Learn All Patterns of Subsequences (Theory)	-	-		-	Medium
Count all subsequences with sum K	Solve		-	-	Hard
Check if there exists a subsequence with sum K	Solve		-	-	Medium
Combination Sum	Solve				Medium
Combination Sum-II	Solve				Medium
Subset Sum-I	Solve			-	Medium
Subset Sum-II	Solve				Medium
Combination Sum - III	Solve		-		Hard
Letter Combinations of a Phone number	Solve		-		Medium

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Palindrome Partitioning	Solve				Medium
Word Search	Solve		-		Medium
N Queen	Solve				Hard
Rat in a Maze	Solve			-	Hard
Word Break	Solve		-
M Coloring Problem	Solve			-	Hard
Sudoko Solver	Solve				Hard
Expression Add Operators	Solve	-	-		Hard

Problem		Resource (Plus)	Practice	Difficulty
Introduction to Bit Manipulation [Theory]	Solve		-	Easy
Check if the i-th bit is set or not	Solve		-	Easy
Check if a number is odd or not	Solve		-	Easy
Check if a number is power of 2 or not	Solve			Easy
Count the number of set bits	Solve		-	Easy
Set/Unset the rightmost unset bit	-	-	-	Easy
Swap two numbers	Solve	-	-	Easy
Divide two integers without using multiplication, division and mod operator	Solve			Medium

Problem		Practice	Difficulty
Count number of bits to be flipped to convert A to B	Solve		Medium
Find the number that appears odd number of times	Solve		Easy
Power Set	Solve		Medium
Find xor of numbers from L to R	Solve	-	Easy
Find the two numbers appearing odd number of times	Solve	-	Easy

Problem		Practice	Difficulty
Print Prime Factors of a Number	Solve	-	Easy
All Divisors of a Number	Solve	-	Easy
Sieve of Eratosthenes	Solve		Medium
Find Prime Factorisation of a Number using Sieve	Solve	-	Medium
Power(n, x)	Solve		Medium

Problem		Practice	Difficulty
Implement Stack using Arrays	Solve	-	Easy
Implement Queue using Arrays	Solve	-	Easy
Implement Stack using Queue	Solve		Medium
Implement Queue using Stack	Solve		Medium
Implement stack using Linkedlist	Solve	-	Easy
Implement queue using Linkedlist	Solve	-	Medium
Check for balanced paranthesis	Solve		Medium
Implement Min Stack	Solve		Medium

Problem		Resource (Plus)	Practice	Difficulty
Infix to Postfix Conversion using Stack	Solve	-	-	Medium
Prefix to Infix Conversion	Solve	-	-	Medium
Prefix to Postfix Conversion	Solve	-	-	Medium
Postfix to Prefix Conversion	Solve	-	-	Medium
Postfix to Infix	-	-	-	Medium
Convert Infix To Prefix Notation	Solve	-	-	Medium

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Next Greater Element	Solve				Easy
Next Greater Element 2	Solve				Medium
Next Smaller Element	Solve	-	-	-	Easy
Number of NGEs to the right	Solve	-	-	-	Medium
Trapping Rainwater	Solve				Hard
Sum of subarray minimum	Solve				Medium
Asteroid Collision	Solve				Medium
Sum of subarray ranges	Solve				Medium
Remove k Digits	Solve				Medium
Largest rectangle in a histogram	Solve				Medium
Maximal Rectangles	Solve				Hard

Problem		Difficulty
Sliding Window maximum	Solve	Hard
Stock span problem	Solve	Medium
The Celebrity Problem	Solve	Hard
LRU cache (IMPORTANT)	Solve	Hard
LFU cache	Solve	Hard

Problem		Practice	Difficulty
Longest Substring Without Repeating Characters	Solve		Medium
Max Consecutive Ones III	Solve		Medium
Fruit Into Baskets	Solve	-	Medium
longest repeating character replacement	Solve		Medium
Binary subarray with sum	Solve		Easy
Count number of nice subarrays	Solve		Medium
Number of substring containing all three characters	Solve		Medium
Maximum point you can obtain from cards	Solve		Medium

Problem		Resource (Plus)	Resource (Free)	Difficulty
Longest Substring with At Most K Distinct Characters	Solve			Medium
Subarray with k different integers	Solve	-		Hard
Minimum Window Substring	Solve		-	Hard
Minimum Window Subsequence	Solve		-	Hard

Problem		Resource (Free)	Practice	Difficulty
Introduction to Priority Queues using Binary Heaps	-	-	-	Medium
Min Heap and Max Heap Implementation	Solve	-	-	Medium
Check if an array represents a min-heap or not	Solve	-	-	Medium
Convert min Heap to max Heap	Solve	-	-	Medium

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Kth largest element in an array [use priority queue]	Solve		-		Easy
Kth smallest element in an array [use priority queue]	-	-	-	-	Easy
Sort K sorted array	-	-	-	-	Easy
Merge M sorted Lists	Solve	-	-		Hard
Replace each array element by its corresponding rank	-	-	-	-	Easy
Task Scheduler	Solve	-	-		Medium
Hands of Straights	Solve	-	-		Medium

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Design twitter	Solve	-	-		Medium
Connect `n` ropes with minimal cost	Solve		-	-	Medium
Kth largest element in a stream of running integers	Solve		-		Easy
Maximum Sum Combination	Solve	-	-	-	Medium
Find Median from Data Stream	Solve	-	-		Hard
K most frequent elements	Solve	-	-		Medium

Problem		Resource (Plus)	Practice	Difficulty
Assign Cookies	Solve			Easy
Fractional Knapsack Problem	Solve	-	-	Medium
Greedy algorithm to find minimum number of coins	Solve		-	Medium
Lemonade Change	Solve			Easy
Valid Paranthesis Checker	Solve			Medium

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
N meetings in one room	Solve			-	Medium
Jump Game	Solve				Medium
Jump Game 2	Solve	-			Medium
Minimum number of platforms required for a railway	Solve			-	Medium
Job sequencing Problem	Solve			-	Medium
Candy	Solve				Hard
Program for Shortest Job First (or SJF) CPU Scheduling	Solve			-	Medium
Program for Least Recently Used (LRU) Page Replacement Algorithm	Solve		-	-	Medium
Insert Interval	Solve				Medium
Merge Intervals	Solve	-			Medium
Non-overlapping Intervals	Solve				Medium

Problem		Resource (Plus)	Practice	Difficulty
Introduction to Trees	-		-	Easy
Binary Tree Representation in C++	-		-	Easy
Binary Tree Representation in Java	-		-	Easy
Binary Tree Traversals in Binary Tree	-	-	-	Easy
Preorder Traversal of Binary Tree	Solve			Easy
Inorder Traversal of Binary Tree	Solve			Easy
Post-order Traversal of Binary Tree	Solve			Easy
Level order Traversal / Level order traversal in spiral form	Solve			Easy
Iterative Preorder Traversal of Binary Tree	Solve			Easy
Iterative Inorder Traversal of Binary Tree	Solve			Easy
Post-order Traversal of Binary Tree using 2 stack	Solve			Easy
Post-order Traversal of Binary Tree using 1 stack	Solve			Medium
Preorder, Inorder, and Postorder Traversal in one Traversal	Solve		-	Medium

Problem		Practice	Difficulty
Height of a Binary Tree	Solve		Medium
Check if the Binary tree is height-balanced or not	Solve		Medium
Diameter of Binary Tree	Solve		Medium
Maximum path sum	Solve		Hard
Check if two trees are identical or not	Solve		Medium
Zig Zag Traversal of Binary Tree	Solve		Easy
Boundary Traversal of Binary Tree	Solve		Medium
Vertical Order Traversal of Binary Tree	Solve		Easy
Top View of Binary Tree	Solve	-	Easy
Bottom View of Binary Tree	Solve	-	Medium
Right/Left View of Binary Tree	Solve		Medium
Symmetric Binary Tree	Solve		Medium

Problem		Resource (Free)	Practice	Difficulty
Root to Node Path in Binary Tree	Solve		-	Medium
LCA in Binary Tree	Solve			Medium
Maximum width of a Binary Tree	Solve			Medium
Check for Children Sum Property	Solve		-	Hard
Print all the Nodes at a distance of K in a Binary Tree	Solve			Medium
Minimum time taken to BURN the Binary Tree from a Node	Solve		-	Hard
Count total Nodes in a COMPLETE Binary Tree	Solve			Medium
Requirements needed to construct a Unique Binary Tree \| Theory	Solve	-	-	Medium
Construct Binary Tree from inorder and preorder	Solve			Hard
Construct the Binary Tree from Postorder and Inorder Traversal	Solve			Hard
Serialize and deserialize Binary Tree	Solve			Hard
Morris Preorder Traversal of a Binary Tree	Solve			Medium
Morris Inorder Traversal of a Binary Tree	Solve			Medium
Flatten Binary Tree to LinkedList	Solve			Hard

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Introduction to Binary Search Tree

-

Easy

Search in a Binary Search Tree

Solve

Easy

Find Min/Max in BST

-

Medium

Problem		Resource (Free)	Practice	Difficulty
Ceil in a Binary Search Tree	Solve		-	Easy
Floor in a Binary Search Tree	Solve		-	Easy
Insert a given Node in Binary Search Tree	Solve	-		Easy
Delete a Node in Binary Search Tree	Solve	-		Medium
Find K-th smallest/largest element in BST	Solve			Medium
Check if a tree is a BST or BT	Solve	-		Medium
LCA in Binary Search Tree	Solve	-		Medium
Construct a BST from a preorder traversal	Solve	-		Medium
Inorder Successor/Predecessor in BST	Solve			Medium
Merge 2 BST's	Solve			Hard
Two Sum In BST \| Check if there exists a pair with Sum K	Solve			Medium
Recover BST \| Correct BST with two nodes swapped	Solve	-		Hard
Largest BST in Binary Tree	Solve	-	-	Hard

Problem		Practice	Difficulty
Graph and Types	-	-	Easy
Graph Representation \| C++	-	-	Easy
Graph Representation \| Java	-	-	Easy
Connected Components \| Logic Explanation	Solve		Hard
BFS	Solve	-	Medium
DFS	Solve	-	Hard

Problem		Resource (Free)	Practice	Difficulty
Number of provinces (leetcode)	Solve			Medium
Connected Components Problem in Matrix	Solve	-	-	Hard
Rotten Oranges	Solve			Medium
Flood fill	Solve			Hard
Cycle Detection in Undirected Graph (bfs)	Solve		-	Hard
Cycle Detection in Undirected Graph (dfs)	Solve		-	Hard
0/1 Matrix (Bfs Problem)	Solve			Medium
Surrounded Regions (dfs)	Solve			Hard
Number of Enclaves [flood fill implementation - multisource]	Solve			Hard
Word ladder - 1	Solve			Hard
Word ladder - 2	Solve			Hard
Number of Distinct Islands [dfs multisource]	Solve			Hard
Bipartite Graph (DFS)	Solve			Medium
Cycle Detection in Directed Graph (DFS)	Solve			Hard

Problem		Practice	Difficulty
Topo Sort	Solve	-	Hard
Kahn's Algorithm	Solve	-	Hard
Cycle Detection in Directed Graph (BFS)	Solve	-	Hard
Course Schedule - I	Solve		Hard
Course Schedule - II	Solve		Hard
Find eventual safe states	Solve		Hard
Alien dictionary	Solve		Hard

Problem		Resource (Free)	Practice	Difficulty
Shortest Path in UG with unit weights	Solve		-	Hard
Shortest Path in DAG	Solve		-	Hard
Djisktra's Algorithm	Solve		-	Hard
Why priority Queue is used in Djisktra's Algorithm	Solve		-	Medium
Shortest path in a binary maze	Solve			Medium
Path with minimum effort	Solve			Medium
Cheapest flights within k stops	Solve			Hard
Network Delay time	Solve	-		Medium
Number of ways to arrive at destination	Solve			Medium
Minimum steps to reach end from start by performing multiplication and mod operations with array elements	Solve		-	Hard
Bellman Ford Algorithm	Solve		-	Hard
Floyd Warshal Algorithm	Solve		-	Hard
Find the city with the smallest number of neighbors in a threshold distance	Solve			Hard

Problem		Resource (Free)	Practice	Difficulty
Minimum Spanning Tree	Solve		-	Hard
Prim's Algorithm	Solve		-	Hard
Disjoint Set [Union by Rank]	Solve		-	Hard
Disjoint Set [Union by Size]	Solve		-	Hard
Kruskal's Algorithm	Solve		-	Hard
Number of operations to make network connected	Solve			Medium
Most stones removed with same rows or columns	Solve			Medium
Accounts merge	Solve			Hard
Number of island II	Solve			Hard
Making a Large Island	Solve			Hard
Swim in rising water	Solve	-		Hard

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Bridges in Graph

Solve

Hard

Articulation Point

Solve

-

Hard

Kosaraju's Algorithm

Solve

-

Hard

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Dynamic Programming Introduction

Solve

-

Medium

Problem		Practice	Difficulty
Climbing Stars	Solve		Medium
Frog Jump(DP-3)	Solve	-	Medium
Frog Jump with k distances(DP-4)	Solve	-	Medium
Maximum sum of non-adjacent elements (DP 5)	Solve		Medium
House Robber (DP 6)	Solve		Medium

Problem		Practice	Difficulty
Ninja's Training (DP 7)	Solve	-	Medium
Grid Unique Paths : DP on Grids (DP8)	Solve		Medium
Grid Unique Paths 2 (DP 9)	Solve		Medium
Minimum path sum in Grid (DP 10)	Solve		Medium
Minimum path sum in Triangular Grid (DP 11)	Solve		Medium
Minimum/Maximum Falling Path Sum (DP-12)	Solve		Medium
3-d DP : Ninja and his friends (DP-13)	Solve	-	Medium

Problem		Practice	Difficulty
Subset sum equal to target (DP- 14)	Solve	-	Medium
Partition Equal Subset Sum (DP- 15)	Solve		Medium
Partition Set Into 2 Subsets With Min Absolute Sum Diff (DP- 16)	Solve		Medium
Count Subsets with Sum K (DP - 17)	Solve	-	Medium
Count Partitions with Given Difference (DP - 18)	Solve	-	Medium
Assign Cookies	Solve		Hard
Minimum Coins (DP - 20)	Solve		Hard
Target Sum (DP - 21)	Solve		Medium
Coin Change 2 (DP - 22)	Solve		Hard
Unbounded Knapsack (DP - 23)	Solve	-	Hard
Rod Cutting Problem \| (DP - 24)	Solve	-	Hard

Problem		Practice	Difficulty
Longest Common Subsequence \| (DP - 25)	Solve		Hard
Print Longest Common Subsequence \| (DP - 26)	Solve	-	Hard
Longest Common Substring \| (DP - 27)	Solve	-	Hard
Longest Palindromic Subsequence \| (DP-28)	Solve		Hard
Minimum insertions to make string palindrome \| DP-29	Solve		Hard
Minimum Insertions/Deletions to Convert String \| (DP- 30)	Solve		Hard
Shortest Common Supersequence \| (DP - 31)	Solve		Hard
Distinct Subsequences\| (DP-32)	Solve		Hard
Edit Distance \| (DP-33)	Solve		Hard
Wildcard Matching \| (DP-34)	Solve		Medium

Problem		Resource (Plus)	Difficulty
Best Time to Buy and Sell Stock \|(DP-35)	Solve		Hard
Buy and Sell Stock - II\|(DP-36)	Solve		Hard
Buy and Sell Stocks III\|(DP-37)	Solve		Hard
Buy and Stock Sell IV \|(DP-38)	Solve		Hard
Buy and Sell Stocks With Cooldown\|(DP-39)	Solve	-	Hard
Buy and Sell Stocks With Transaction Fee\|(DP-40)	Solve		Hard

Problem		Practice	Difficulty
Longest Increasing Subsequence \|(DP-41)	Solve		Hard
Printing Longest Increasing Subsequence\|(DP-42)	Solve	-	Hard
Longest Increasing Subsequence \|(DP-43)	Solve	-	Hard
Largest Divisible Subset\|(DP-44)	Solve		Hard
Longest String Chain\|(DP-45)	Solve		Hard
Longest Bitonic Subsequence \|(DP-46)	Solve	-	Hard
Number of Longest Increasing Subsequences\|(DP-47)	Solve		Hard

Problem		Resource (Plus)	Practice	Difficulty
Matrix Chain Multiplication\|(DP-48)	Solve		-	Hard
Matrix Chain Multiplication \| Bottom-Up\|(DP-49)	Solve		-	Hard
Minimum Cost to Cut the Stick\|(DP-50)	Solve			Hard
Burst Balloons\|(DP-51)	Solve			Hard
Evaluate Boolean Expression to True\|(DP-52)	Solve			Hard
Palindrome Partitioning - II\|(DP-53)	Solve			Hard
Partition Array for Maximum Sum\|(DP-54)	Solve	-		Hard

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Maximum Rectangle Area with all 1's|(DP-55)

Solve

Hard

Count Square Submatrices with All Ones|(DP-56)

-

Hard

Status

Problem

Resource

(Plus)

Resource

(Free)

Practice

Note

Revision

Difficulty

Implement TRIE | INSERT | SEARCH | STARTSWITH

Solve

Hard

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Implement Trie - 2 (Prefix Tree)	Solve		-	-	Hard
Longest String with All Prefixes	Solve		-	-	Medium
Number of Distinct Substrings in a String	Solve			-	Hard
Bit PreRequisites for TRIE Problems	-	-	-	-	Hard
Maximum XOR of two numbers in an array	Solve				Medium
Maximum XOR With an Element From Array	Solve				Hard

Problem		Resource (Plus)	Resource (Free)	Practice	Difficulty
Minimum number of bracket reversals needed to make an expression balanced	Solve		-		Medium
Count and say	Solve		-		Medium
Hashing In Strings \| Theory	-	-	-	-	Medium
Rabin Karp	Solve		-		Hard
Z-Function	Solve		-		Easy
KMP algo / LPS(pi) array	Solve		-		Hard
Shortest Palindrome	Solve		-		Hard
Longest happy prefix	Solve		-		Hard
Count palindromic subsequence in given string	Solve	-	-	-	Hard

Certificate of Completion

Strivers A2Z DSA Course

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